Enter the area and how deep you're laying it, and get the cubic yards, tons and bags of gravel to buy — for driveways, paths and drainage.
Gravel is bought by volume (cubic yards) or by weight (tons). Start with the length and width of the area in feet and the depth you plan to lay in inches. Length × width gives square feet; multiply by the depth in feet (inches ÷ 12) for cubic feet; divide by 27 for cubic yards. To get tons, multiply the cubic yards by the stone's weight — roughly 1.4 tons per cubic yard for typical gravel.
One cubic yard of gravel weighs about 1.4 tons (around 2,800 lb). A 50 lb bag holds about half a cubic foot, so it takes roughly 54 bags to equal a cubic yard — bags make sense only for small patches. For a driveway or a big area, order bulk by the ton or cubic yard.
A garden path or drainage bed is usually 2 to 3 inches. A car driveway is built up in layers totaling about 4 to 6 inches, more for trucks and heavy loads. Enter whatever depth you're planning and the calculator does the rest.
This is a planning aid. Stone weights are approximate and vary with material type and moisture — 1.4 tons per cubic yard is a common average, not an exact figure. Confirm density with your supplier for a big order, and round up.